It happens to me way too often. You know the feeling, right? It’s that “have I actually been here, or was that in a dream?”. Tycho puts it into words, except for him it happens with games. Like so:
Speaking specifically to the Lairs, there were moments where the obvious “structure” of the levels you’re supposed to traverse in game terms melted away into completely organic environments, which I could then navigate intuitively. That happened in Uncharted 2 quite often, and it alters your brain function. i think that if I try to recall these places in the future, I might recall them as places I’ve been.